Radiation Image Detector Segmentation for Multi-Region AEC
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Solution Overview
Problem
Existing radiation image capturing apparatuses face limitations in setting multiple regions of interest due to the need for detection elements connected to the same gate line, reducing the degree of freedom in setting regions and potentially requiring complex circuit arrangements for high-speed signal acquisition.
Innovation Solution
A radiation image capturing apparatus with a control unit that supplies selection signals to multiple drive circuits to select row signal lines for detection pixels, allowing independent operation and high-speed signal acquisition from multiple regions of interest without complex circuit arrangements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high-level signals are always supplied to a gate line to acquire signals from detection elements for AEC, then high time resolution is achieved, but the degree of freedom in setting multiple regions of interest is reduced
Solution Approach 1:
The detection elements are divided into multiple groups, with each group connected to a different gate line. This segmentation allows independent control of each gate line, enabling simultaneous signal acquisition from multiple regions of interest while maintaining high time resolution through continuous high-level signal supply to each gate line independently.
Solution Approach 2:
The gate lines are configured to dynamically select different detection element groups based on the desired region of interest. This dynamic configuration allows the system to adapt to different measurement requirements while maintaining continuous signal acquisition capability for high time resolution AEC.
2Productivity
If detection elements connected to the same gate line are used for AEC, then high-speed signal acquisition is achieved, but the flexibility in setting multiple regions of interest is reduced
Solution Approach 1:
Multiple gate lines are used to divide detection elements into separate groups, allowing parallel signal acquisition from different regions. Each gate line can independently drive its connected detection elements at high speed, while the system as a whole gains flexibility to configure multiple regions of interest by selecting appropriate detection elements from different gate line groups.
Solution Approach 2:
Each gate line is designed to serve multiple potential regions of interest, and detection elements can be assigned to different gate lines based on the measurement requirements. This multi-functional configuration enables the system to achieve both high-speed acquisition and flexible region setting by appropriately assigning detection elements to gate lines.
3Adaptability or versatility
If multiple regions of interest are set using detection elements from different gate lines, then flexibility is improved, but complex circuit arrangements are required
Solution Approach 1:
The detection elements are segmented into groups connected to different gate lines, with each gate line independently controllable. This segmentation provides flexibility to select detection elements from multiple gate lines for different regions of interest while keeping the circuit arrangement relatively simple, as each gate line operates independently without requiring complex interconnections.
Solution Approach 2:
Multiple gate lines are merged into a unified detection system that can simultaneously or sequentially acquire signals from different regions of interest. This merging approach maintains flexibility while simplifying the overall circuit arrangement by using a modular structure where each gate line follows a similar design pattern, reducing the need for complex custom circuitry.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables high-speed signal acquisition from multiple regions of interest with increased flexibility in setting regions, improving the accuracy and efficiency of Automatic Exposure Control (AEC) without the need for complex circuitry.
Implementation Method 1
a radiation image capturing apparatus using an FPD (Flat Panel Detector) formed from a semiconductor material has been widely used. Such a radiation image capturing apparatus is known to measure radiation entering the radiation image capturing apparatus in real time.
Data Source
AI summary
A radiation image capturing apparatus is provided. The apparatus comprises pixels, drivers to which row signal lines for driving the pixels for each row are respectively connected and a controller. The controller supplies, before radiation irradiation, selection signals to a driver group constituted by not less than two drivers which drive detection pixels, of the pixels, to cause each of the drivers included in the driver group to select a row signal line to which the detection pixels are connected, and the controller supplies, during radiation irradiation, a drive signal for driving pixels connected to a row signal line selected from the plurality of row signal lines to each driver included in the driver group to cause the radiation image capturing apparatus to acquire a signal for measuring a dose of radiation entering from each of the detection pixels.